gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/tkt4018.test (about) 1 # 2009 August 20 2 # 3 # The author disclaims copyright to this source code. In place of 4 # a legal notice, here is a blessing: 5 # 6 # May you do good and not evil. 7 # May you find forgiveness for yourself and forgive others. 8 # May you share freely, never taking more than you give. 9 # 10 #*********************************************************************** 11 # This file implements regression tests for SQLite library. 12 # 13 # This file implements tests to verify that ticket #4018 has been 14 # fixed. 15 # 16 17 set testdir [file dirname $argv0] 18 source $testdir/tester.tcl 19 do_not_use_codec 20 21 proc testsql {sql} { 22 set fd [open tf_main.tcl w] 23 puts $fd [subst -nocommands { 24 sqlite3_test_control_pending_byte 0x0010000 25 sqlite3 db test.db 26 set rc [catch { db eval {$sql} } msg] 27 puts -nonewline "[set rc] {[set msg]}" 28 flush stdout 29 exit 30 }] 31 close $fd 32 set fd [open "| [info nameofexec] ./tf_main.tcl" r] 33 set res [read $fd] 34 close $fd 35 return $res 36 } 37 38 do_test tkt4018-1.1 { 39 execsql { 40 CREATE TABLE t1(a, b); 41 BEGIN; 42 SELECT * FROM t1; 43 } 44 } {} 45 46 # The database is locked by connection [db]. Open and close a second 47 # connection to test.db 10000 times. If file-descriptors are not being 48 # reused, then the process will quickly exceed its maximum number of 49 # file descriptors (1024 by default on linux). 50 do_test tkt4018-1.2 { 51 for {set i 0} {$i < 10000} {incr i} { 52 sqlite3 db2 test.db 53 db2 close 54 } 55 } {} 56 57 # Now check that connection [db] is still holding a SHARED lock by 58 # having a second process try to write the db. 59 do_test tkt4018-1.3 { 60 testsql {INSERT INTO t1 VALUES(3, 4)} 61 } {1 {database is locked}} 62 63 # Sanity checking. Have [db] release the lock and then retry the 64 # INSERT from the previous test case. 65 do_test tkt4018-1.4 { 66 db eval COMMIT 67 testsql {INSERT INTO t1 VALUES(3, 4)} 68 } {0 {}} 69 70 # Check that reusing a file descriptor cannot change a read-only 71 # connection into a read-write connection. 72 do_test tkt4018-2.1 { 73 sqlite3 db2 test.db 74 execsql {INSERT INTO t1 VALUES(1, 2)} db2 75 } {} 76 do_test tkt4018-2.2 { 77 execsql { 78 BEGIN; 79 SELECT * FROM t1 ORDER BY a; 80 } 81 } {1 2 3 4} 82 do_test tkt4018-2.3 { 83 db2 close 84 sqlite3 db2 test.db -readonly 1 85 execsql COMMIT 86 catchsql {INSERT INTO t1 VALUES(5, 6)} db2 87 } {1 {attempt to write a readonly database}} 88 db2 close 89 90 finish_test